Refrigerating apparatus



Aug. 15, 1933. J. G. KING REFRIGERATING APPARATUS Filed April 50, 1950 2 Sheets-Sheet l b INVENTOR B Y v WM W 5 A TTORNE Y Patented Aug. 15, 1933 UNITED STATES REFRIGERATING APPARATUS Jesse G. King, Dayton, Ohio, assignor to Frigidaire Corporation, Dayton, Ohio, a Corporation of Delaware Application April 30, 1930. Serial No. 448,580

2 Claims.

companying drawings, wherein a preferred form of the invention is clearly shown.

In the drawings:

Fig. 1 is a front view in elevation of an evaporator embodying features of my invention;

Fig. 2 is a portion of the evaporator shown in Fig. 1;

Fig. 3 is a side view of the evaporator shown in Fig. 1;

Fig. 4 is a view showing a closure means for the rear of the evaporator;

Fig. 5 is a view of a modified form of evaporator construction and showing the evaporator partly in elevation and partly broken away, and

Fig. 6 is a side view in elevation of the evaporator shown in Fig. 5.

Referring to the drawings, an evaporator designated generally by the numeral 20 may comprise in general a container or header 22 forming a reservoir for liquid refrigerant and which is adapted to contain the usual float valve mechanism 23 for controlling the admission of refrigerant to the header. The header may be provided with a plurality of upwardly extending lugs 24 which may be employed for suspending the evaporator 20 in a refrigerator cabinet (not shown). A valve plate 25 may be secured to the one end of the header by screws 26. The valve plate is provided with a suction shutoff valve 28 and a refrigerant shut off valve 29. Depending from and connected to the header r is a pair of channelled sheet metal walls 31 and 32 joined at their ends by a connecting channelled wall 33. Preferably these walls are formed as follows: A pair of generally U-shaped corrugated sheets 35 and 36 are suitably joined together to form the walls 31, 32 and 33. Preferably the sheets are seam-welded at their ends and spot-welded along the lines where the de-' pressed portions of the sheets are in alignment. Thus suitable tie means is provided for holding said sheets together against pressure within the walls. The channelled walls forming the ducts 33a provides means for the circulation of liquid refrigerant and incloses a freezing space 37. Brackets 38 may be secured to the walls 31 and 32 for supporting an ice-making receptacle, while the hollow wall 33 provides means for supporting a second ice-making receptacle. As shown in Fig. 1 the open ends 40 of the walls 31 and, 32 may be inserted in openings 41 provided in the header where the ends 40 are preferably soldered in position. The rear portion of the freezing space may be closed by plate 44 detachably secured to the walls 31 and 32 by screws 45 inserted in screw-threaded apertures 46 provided in the brackets 38.

The exposed parts of the elements thus described are plated with a coating of chromium. Thus an evaporator of the type having substantially flat channelled walls presents a neat appearance and when coated with chromium constitutes a very smooth, hard, non-rusting, noncorroding finish which is very easily cleaned.

Referring to Figs. 5 and 6 I construct an evaporator entirely of sheet metal which permits the evaporator to be formed by punching and stamping operations which are very economical to carry out. The evaporator includes a generally cylindrical header which forms the reservoir for liquid refrigerant which is adapted to contain the float valve, not shown, for controlling the admission of refrigerant thereto. Depending from and connected to the header are two hollow walls 67 which circulate the refrigerant and whichdefine a freezing space 69 adapted to receive ice-making receptacles which may be supported on brackets '70 secured to the walls. The evaporator structure includes a generally U-shaped member 72 formed of sheet metal and a second generally U-shaped member 74 formed of sheet metal. It will be noticed that the bridges of Us include mutually convex portions 75 and 76, which when placed together formed the substantially cylindrical header. The two sheets are joined together in spaced relation so thattheir vertical portions form the channelled walls 67 for circulating the refrigerant. This may be conveniently accomplished simply by bending one of the sheets along its edges, as indicated at 78 in Fig. 5, and welding the two sheets together. The header is closed at one end by plate 79 secured to the sheets 72 and 'I4 and is left open at the other end to enable a float valve to be inserted in the header. A flange 80 is welded to the open end of the header to receive a closure, which latter may carry the float valve. The closure may be secured to a split ring 82 thus clamping said closure to the flange 80.

In order to provide means to hold the two sheets together against pressure within the walls, one or both of the sheets may be provided with a plurality of depressed portions 85 spaced in parallel relation and the depressed portion of the sheet 72 engaging the depressed portion of the sheet 74. These depressed portions may be spotwelded together at various places to thus form tie means for holding the sheets together.

The exposed parts of the evaporator 65 described herein are coated with a plating of chromium. Thus an evaporator having a container and duct means formed integral therewith may be made to thus present substantially flat walls which present a very neat appearance and when coated with chromium constitute a very smooth, hard, non-rusting, non-corroding finish which is very easily cleaned.

While the form of embodiment of the invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

1. A cooling unit for mechanical refrigerating systems comprising in combination, sheet metal members having a portion thereof spaced apart and sealed at the edges of the spaced apart portion to provide refrigerant conveying duct means therebetween, said members being bent to form walls of a sharp freezing zone, means secured to the inner surface of a wall of said freezing zone for supporting a receptacle to be cooled within the zone, and means on said first named means for detachably connecting a cover plate to one end of the freezing zone.

2. A cooling unit for mechanical refrigerating systems comprising in combination, sheet metal members having a portion thereof spaced apart and sealed at the edges of the spaced apart portion to provide refrigerant conveying duct means therebetween, said members being bent to form opposed vertical walls and a horizontal wall of a sharp freezing zone, means secured to the inner surface of said opposed vertical walls of said freezing zone for supporting a receptacle to be cooled within the zone, and means on each of said first named means for detachably connecting a cover plate to one end of the freezing zone. 1

JESSE G. KING. 

